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NAME    [Toc]    [Back]

       host.conf - resolver configuration file

DESCRIPTION    [Toc]    [Back]

       The  file /etc/host.conf contains configuration information specific to
       the resolver library.  It should contain one configuration keyword  per
       line,  followed by appropriate configuration information.  The keywords
       recognized are order, trim, multi, nospoof and reorder.	 Each  keyword
       is described seperately below.

       order  This keyword specifies how host lookups are to be performed.  It
	      should be followed by one or more lookup methods,  seperated  by
	      commas.  Valid methods are bind, hosts and nis.

       trim   This  keyword may be listed more than once.  Each time it should
	      be followed by a single domain name, with the leading dot.  When
	      set,  the  resolv+  library  will  automatically	trim the given
	      domain name from the end of any hostname resolved via DNS.  This
	      is  intended  for  use  with  local hosts and domains.  (Related
	      note: trim will not affect host- names gathered via NIS  or  the
	      hosts file.  Care should be taken to insure that the first hostname
 for each entry in the hosts file is fully qualified or nonqualified,
 as appropriate for the local installation.)

       multi  Valid  values are on and off.  If set to on, the resolv+ library
	      will return all valid addresses for a host that appears  in  the
	      /etc/hosts  file,  instead  of  only  the first.	This is off by
	      default, as it may cause a substantial performance loss at sites
	      with large hosts files.

	      Valid  values are on and off.  If set to on, the resolv+ library
	      will attempt to prevent hostname spoofing to enhance  the  security
 of rlogin and rsh.  It works as follows: after performing a
	      host address lookup, resolv+ will perform a hostname lookup  for
	      that address.  If the two hostnames do not match, the query will

	      If this option is set to on and the nospoof option is also  set,
	      resolv+ will log a warning of the error via the syslog facility.
	      The default value is off.

	      Valid values are on and off.  If set to on, resolv+ will attempt
	      to  reorder host addresses so that local addresses (i.e., on the
	      same subnet) are listed first when a  gethostbyname(3)  is  performed.
  Reordering is done for all lookup methods.  The default
	      value is off.

FILES    [Toc]    [Back]

	      Resolver configuration file

	      Resolver configuration file

	      Local hosts database

SEE ALSO    [Toc]    [Back]

       gethostbyname(3), hostname(7), resolv+(8), named(8)

Debian GNU/Linux		  1997-01-02			  HOST.CONF(5)
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